Very disappointed client

I'm a client at absa bank and my wife Kgaotsang Jacqueline Thulo works for absa bank in Warrenton branch northern cape. I have recently switched my salary from absa bank to another bank, reason being that my wife will go through my accounts though she has no authority. How did I find out that she was going through my accounts, I removed her as a beneficiary in my insurance and she called me to question me about that. I asked her never to go through my account but still she did that. My question is, is the absa bank staff allowed to go through clients account without authority. If that's the case absa bank is losing clients because of this and what is absa doing about this... I will be waiting for a reply on this matter.

Kind regards Jony Thulo